I'm sure this will be contentious on /., but it sounds like you're short on time, so I'm not going to beat around the bush.
It's said that 2000 years ago, Jesus died, and three days later rose from the dead. If this is true, you have access to eternal life for yourself, and you may be able to prompt your daughter down that road as well. Quite literally, you would be able to enjoy each other forever.
I encourage you to check this out for yourself. Every argument and counter-argument has already been studied to death, but the trick in your situation is to get to the key issues ASAP so you can make an informed judgment. A good pastor can help, as he's seen this all before. Personally I recommend reading / listening to Tim Keller. His writings and sermons probably address a lot of questions you might have: http://www.redeemer.com/r/qc_a...
I'm very sorry for your suffering. I wish you and your daughter the best.